| /* s_isnanl.c -- long double version for i387 of s_isnan.c. |
| * Conversion to long double by Ulrich Drepper, |
| * Cygnus Support, drepper@cygnus.com. |
| */ |
| |
| /* |
| * ==================================================== |
| * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
| * |
| * Developed at SunPro, a Sun Microsystems, Inc. business. |
| * Permission to use, copy, modify, and distribute this |
| * software is freely granted, provided that this notice |
| * is preserved. |
| * ==================================================== |
| */ |
| |
| #if defined(LIBM_SCCS) && !defined(lint) |
| static char rcsid[] = "$NetBSD: $"; |
| #endif |
| |
| /* |
| * isnanl(x) returns 1 is x is nan, else 0; |
| * no branching! |
| */ |
| |
| #include <math.h> |
| #include <math_private.h> |
| |
| int __isnanl(long double x) |
| { |
| int32_t se,hx,lx; |
| GET_LDOUBLE_WORDS(se,hx,lx,x); |
| se = (se & 0x7fff) << 1; |
| /* The additional & 0x7fffffff is required because Intel's |
| extended format has the normally implicit 1 explicit |
| present. Sigh! */ |
| lx |= hx & 0x7fffffff; |
| se |= (u_int32_t)(lx|(-lx))>>31; |
| se = 0xfffe - se; |
| return (int)((u_int32_t)(se))>>16; |
| } |
| hidden_def (__isnanl) |
| weak_alias (__isnanl, isnanl) |
